come up short(redirected from you are coming up short)
come up short
To disappoint; to fail to meet certain expectations or goals. I came up short on my sales goal this month, which is really disappointing. I know I was supposed to run a full mile. I didn't want to come up short, but I was going to collapse if I didn't take a break!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.